Shinra is a fan of gunpla and wishes to enter the japan tournament to become the number 1 gunpla player in japan.

his gunpla's fighting style relies on his feet as they have flusters and laser beams in them.

there's nothing much else in this head considering it will be based on the timeline of gundam build fighters try.

if you have any further ideas add them in the comments and as a group we can figure something out